Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5686784 | Composite shiftable aperture mask | Klaus-Peter Helmetag | 1997-11-11 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5686784 | Composite shiftable aperture mask | Klaus-Peter Helmetag | 1997-11-11 |